code: def setUp(self):
      size = self.BASECOMM.Get_size()
      rank = self.BASECOMM.Get_rank()
      if rank < size // 2:
          self.COLOR = 0
          self.LOCAL_LEADER = 0
          self.REMOTE_LEADER = size // 2
      else:
          self.COLOR = 1
          self.LOCAL_LEADER = 0
          self.REMOTE_LEADER = 0
      self.INTRACOMM = self.BASECOMM.Split(self.COLOR, key=0)
      Create_intercomm = MPI.Intracomm.Create_intercomm
      self.INTERCOMM = Create_intercomm(
          self.INTRACOMM,
          self.LOCAL_LEADER,
          self.BASECOMM,
          self.REMOTE_LEADER,
      )
  
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 1 for calling the BaseTestIntercomm obj's underlying member method code with example usage: obj.setUp() without return types